diff --git a/ChangeLog b/ChangeLog
index e575410175..2409048a82 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+Wed Mar 12 16:48:19 2003  WATANABE Hirofumi  <eban@ruby-lang.org>
+
+	* io.c (prep_stdio): set binmode only if the file descriptor
+	  is not connected to a terminal on Cygwin.
+
 Tue Mar 11 21:00:59 2003  Minero Aoki  <aamine@loveruby.net>
 
 	* lib/net/smtp.rb: Digest string wrongly included '\n' when user
diff --git a/io.c b/io.c
index af370ddeb4..12c60482fc 100644
--- a/io.c
+++ b/io.c
@@ -2792,8 +2792,10 @@ prep_stdio(f, mode, klass)
 
     MakeOpenFile(io, fp);
 #ifdef __CYGWIN__
-    mode |= O_BINARY;
-    setmode(fileno(f), O_BINARY);
+    if (!isatty(fileno(f))) {
+	mode |= O_BINARY;
+	setmode(fileno(f), O_BINARY);
+    }
 #endif
     fp->f = f;
     fp->mode = mode;
diff --git a/version.h b/version.h
index 1a4972ba7e..93e2edb8f8 100644
--- a/version.h
+++ b/version.h
@@ -1,11 +1,11 @@
 #define RUBY_VERSION "1.8.0"
-#define RUBY_RELEASE_DATE "2003-03-11"
+#define RUBY_RELEASE_DATE "2003-03-12"
 #define RUBY_VERSION_CODE 180
-#define RUBY_RELEASE_CODE 20030311
+#define RUBY_RELEASE_CODE 20030312
 
 #define RUBY_VERSION_MAJOR 1
 #define RUBY_VERSION_MINOR 8
 #define RUBY_VERSION_TEENY 0
 #define RUBY_RELEASE_YEAR 2003
 #define RUBY_RELEASE_MONTH 03
-#define RUBY_RELEASE_DAY 11
+#define RUBY_RELEASE_DAY 12